Bending die



Sept. 22, 1936. s ET AL 2,054,821

' BENDING DIE Filed July 10, 1955 BY g a ATTORNEYS.

N/ TNESS.

Patented Sept. 22, 1936 7 2,054,821 f BENDING DIE Nathan Kase, Brooklyn,and Louis Wiesenfeld,

' I New York, N. Y.

Application my 10, 1935, Serial No. 30,626

7 Claims. (Cl. 153-1) This invention relates to improvements in bendingdies. In our Letters Patent No. 2,013,706 granted September 10, 1935 forFastening device, there is disclosed a slide fastener: for closing theentrance opening of a bag or like article, and the device consistsgenerally of a plurality of clips joined together by a flexible element,the clips being bent into operative 'position' about retaining beads onthe walls of the opening in the article. one of the end clips beingfixedly-anchored to the beads while the remaining clips are slidablyassociated therewith. It is therefore the main object of this inventionto provide a bending die which will simultaneously bend all of the clipsabout the beaded edges of the openin to ,be closed thereby, and whichwill bend one of-the end clips a greater degree than the others toeffect an anchoring of the sameto the article on which the device is tobe used. I 3

Another feature of the invention resides in a clip bending die whichincludes positioning and supporting means for a row of clips to be bent,and tension means acting upon the clips to hold them seated-preparatoryto the bending operation.

I A further feature of the-invention is the provision of a bending diewhich includes a pair of coacting die members. whichwhen broughttogether. operate to bend a row' of flexibly. connected clips from anormally open position to a closedposition, the die faces beingsuchthata predetermined clip is merc fully. closed than the otherstoprovide an anchor clip for the row or :set of clips for captivelyconnecting the fastening device to an article to be equipped therewith.I

With these and other objectsinview, the invention resides in the certainnovel construction, combination and arrangement. of parts'the essentialfeatures of which'arehereinafter fully described, are particularlypointed out in the appendedclaims, and; are illustratedin theaccompanyingdrawing, in which:

Figure 1 'is an end elevational view of the clip bending die, the partsbeing shown in closed position. v 7 V Figure 2 is a front elevationalview.

. Figure 3 is an enlarged vertical transverse sectional view on the line33 of Figure 2, but showing the die member in open position in fulllines and in closed position in dotted lines, the open end of a bagbeing fitted with the clip fastener also being shown in dotted lines.

Figure F1: is a vertical transversesectional view on the line l-r-4 ofFigure 2, but showing the die m in partially closed position-in fulllines and in fully closed position in dotted lines, the open end of abag being fitted with the clip fastener being shown in full lines;

Figure 5 is a collective perspective view of the coacting die members inseparated condition.

' Figure 6 is a perspective view of a bag-equipped with the clipfastening device applied thereto by the use of the clip bending die, theclips being In Figure 6 of the drawingqwe have shown for illustrativepurposes, the flexible bag In equipped with a slide clip fasteningdevice H for closing the open top thereof. The fastening: de-' vice llincludes a plurality'of substantially U- shaped clips Hi, the free endof one of the legs of each clip being provided with an eye l3, the widthof the eye being less than the width of the body portion of the clip.Passing through the eyes I3 is a flexible element in the form of a chainI4, the eyes tightly engaging the chain to secure thesame theretoagainst sliding. The chain I4 is of a length approximating the length ofthe bag'opening, and the clips are fixed thereto at spaced distances tobe spread out the length of the opening to close the same as shown infull lines in Figure 6. The clips l2 are bent about a pair of beadsl5-l5 provided at the opposite edges of the bag opening and extendingthe length thereof, the beads lying in substantially the same plane whenthe bag opening is closed.

One of the end clips l2 andfurther designated by the letter Aconstitutes an anchor clip and is more tightly bent about the beads toprevent sliding movement thereof and to captively connect the fasteningdevice to the bag. The other clips I2 slide toward and away from theanchor clip A when moved to open and closed positions respectively. Theconstruction so far described is shown in our Letters Patent No.2,013,706 above referred to, and has been herein shown and described tomore clearly set forth the purpose 7 of our bending die, now to bedescribed.

Each of the U-shaped clips l2 before bending are of a, shape shown inFigure 7 and includes a bight portion B and a pair of outwardlydiverging legs C and D. The eye I 3 is formed on the free end of the legD and this leg at its free end is bent inwardly at E, thus making theeye inwardly offset with respect to the leg D, and when the leg 0 isbent down toward the leg D, the

eye l3 and the leg C cooperate to provide a restricted entrance to theclip.

Our bending die includes a lower stationary die member l6 which is ofsubstantially rectangular configuration and extending downward- 1y fromthe bottom thereof, is an attaching bolt I! which passes through anopening |8 in a table or other like support IS, the threaded end of thebolt or stud |1 receiving a clamping nut2l| which bears against a washer2| interposed between the nut and the underside of the table I9.Extending inwardly of the top of the die member l6 and opening at thefront thereof isfla channel 22 of a shape in cross section to conformto'and I receive the leg sides D of aplurality of clips l2.

of the clips rest. The channel 22 and the shoulder 24 extend the fulllength of the die member and which length may be optional, dependingupon the number of clips to be bent in a single operation.

Screwed into threaded sockets 25 which open onto the top side of; thedie member 16, are threaded studs 26', the outer ends having heads 21.Studs 26ifreely pass through openings 28 provided in a plate 29, thefront edge of the plate overhanging the channel 22. Springs 30 areinterposed between the plates 29 and the heads 21 of the respectivestuds for the purpose of placing a tension upon the plate for a purposeto be presently explained. It will be appreciated that this tension maybe adjusted to any desired degree by turning the threaded studfZB'ineither direction. One of the front corners of the plate 29 is cut awayfor a distance approximating the widthj of one ofthe clips to be bentand which cut-away portion is designated at 3|.

superposed with respect to the lower stationary die member |6, is anupper movable die member 32', which is also of substantially rectangularconfiguration and from which an actuating stem 33 rises. The stem '33may be operatively connected to any actuating mechanism for imparting anup and down sliding movement to the die member- 32 with respect tothe-stationary die member l6. Any foot actuated means or electricallycontrolled means may be resorted to for operating the slidable diemember 32. The die member 32 is provided with vertical openings 34 forfreely receiving the upwardly extending por-; tions of the threadedstuds 26. The under side of the die member 32 is provided'with adownwardly'extending rib 35 which extends the length of the die memberand is disposed in vertical alinement with the front portion of thechannel 22 of the lower die member l6. It is this rib 35 which serves topress a row of clips to be bent with the exception of the end anchorclip, and for the purpose of bending the anchor clip a greater degreethanthe other clips, there is provided a screw 36' which is threadeddownwardly through anopening 31 in the diemember 32, the inner'end ofthe screw being disposed outwardly beyond the plane of the rib 35 asbest seen in Figure 3 of'the drawing. The screw 36 may be held in anadjusted position by a nut 38 which is threaded thereto and bearsagainst the top of the die member 32. It is 'of course understood thatthe screw 36 is provided with a head 39, the same having a; kerf 40 tofacilitate the insertion of a'screw driver to impart turning movementtothe. screwto effect an adjustment. The

screw 36 is located at one end of the die member 32 and upon downwardmovement of the said die member, the depending end of the screw clearsthe plate 29 by reason of the cut away portion 3|.

In the operation of the die, a plurality of clips I2 joined by the chainl4 are respectively placed in the channel 22 of the stationary diemember l6 as illustrated in Figure 5. The clips |2 are bunchedtogetherone against the other and one of the end clips is disposedbeneath the cut away portion 3| of the plate 29. When the clips are:placed in the channel 22 theupwardly extending legs C are engaged bythe front edge of the plate -29 and by reason of the spring tension uponthe plate, a corresponding tension is placed upon theclips to maintainthem in seated position. It is possible to position the bodies of theclips one against the other by reason of the fact that the eyes "ll-areof a less width to permit of portions of the chain between the clips todepend downweirdlyin loop formation, the front of the stationary diemember [6 below the shoulder 24 being cut away as at 4| to accommodatethe looped portions of the chain. With the clips positioned in thestationary die member as just described, the beaded end of the bag H1 isinserted into-the clipsas shown in dotted lines in Figure 3 and in fulllines in Figure 4. The beads |5|'5 are received within the clips betweenthe bight portions B and the onset eye l3, with the body of the bagextending outwardly from thedie. Upon operation of the actuating means,the uppermovable die member 32 moves downwardly, and in so doing the rib35 engages the free ends of the legs 0 of the clips, excepting the endanchor clip-A, and bends the legs to a substantially horizontal positionas shown in dotted lines in Figure 4. Simultaneously withthe engagementof the rib 35 with all the clips excepting the anchor clip, thedepending end of the screw 36 strikes the end anchor clip -A and pressesthe leg C into tight engagement with the open end of the bag H). Inorder to effect an absolute tight clamping between the eye l3 of theanchor clip A and the leg C, the end of the screw 36may slightly deformthe body of the clip as shown in dotted lines in Figure 3. After thebending operation, the actuating meansjmay be operated to effect anupward movement of the upper die 32, whereupon the bag I!) may bewithdrawn from the die with the clips in fastened position thereon, andwhich produces a closure fastener of the type shown in Figure 6 of the,drawing.

While we have shown and described what we consider to be the mostpractical embodiment of our invention, we wish it to be understood thatvarious changes in construction as come within the scope of the appendedclaims, may be resorted to if desired.

Having thus described the invention, what we claim as new and desire tosecure by Letters Patent of theUnited States, is:-

1. A slide fastener bending die for the purpose of bending the legs of aplurality of loosely connected substantially open U-shaped clipstogether about a pair of meeting beaded edges of an article to beequipped with such slide fastener comprising a pair of coacting diemembers, one movable relative to the other, meanson one of the diemembers for seating thereon a row of clips to be bent, resilient holdingmeans engageable with the seated clips to prevent accidental movementthereof, and means on the other of said die members engageable withclips for effecting bending of the same to a substantially closedposition. .75

2. A slide fastener bending die for the purpose of bending the legs of aplurality of loosely connected substantially open U-shaped clipstogether about a pair of meeting beaded edges of an article to beequipped with such slide fasteners comprising a lower stationary diemember, means on said stationary die member for seating and holding arow of clips to be bent, an upper vertical movable die member, and meanson the upper die member engageable with the clips upon downward movementthereof to cause a simultaneous bending of the clips to a substantiallyclosed position, and effecting a greater bending of one of the clipsthan that imparted to the others.

3. A slide fastener bending die for the purpose described comprising apair of complementary superposed die members, a seat extendinglengthwise of the lower of said die members for receiving the work to bebent, a spring actuated plate overlying said seat for resilientlyholding the work upon said seat, and a pressing rib extending downwardlyfrom the upper die member above said seat, and clear of the plan-e ofsaid plate.

4. A slide fastener bending die for the purpose of bending a pluralityof loosely connected substantially open U-shaped clips to substantiallyclosed position about a pair of meeting beaded edges comprising a lowerstationary die member having a channel extending lengthwise thereof forthe seating of the clips to bebent, an upper vertically slidable diemember including a rib depending from the bottom thereof for pressingengagement with the upstanding legs of the clips, and a bending elementcarried by said upper movable die member and extending below the planeof said rib for bending one of the clips a greater degree than theothers.

5. 'A slide fastener bending die for the purpose of bending a pluralityof loosely connected substantially open U-shaped clips to substantiallyclosed position about a pair of meeting beaded edges comprising a lowerstationary die member having a channel extending lengthwise thereof forthe seating of the clips to be bent, an upper vertically slidable diemember including a rib depending from the bottom thereof for pressingengagement with the upstanding legs of the clips, and an adjustablebending element carried by said upper movable die member and extendingbelow the plane of said rib for bending one of the clips a greaterdegree than the others.

6. A slide fastener bending die for the purpose of bending a pluralityof loosely connected substantially open U-shaped clips to substantiallyclosed position about a pair of meeting beaded edges comprising a lowerstationary die member having a channel extending lengthwise thereof forthe seating of the clips to be bent, a spring pressed plate carried bysaid stationary die member and overlying said channel for holding theclips seated therein, an upper vertically slidable die member includinga rib depending from the bottom thereof for pressing engagement with theupstanding legs of the clips, and a bending element carried by saidupper movable die member and extending below the plane of said rib forbending one of the clips a greater degree than the others.

7. A slide fastener bending die for the purpose described comprising alower elongated stationary die member having a channel extendinglengthwise thereof for receiving a plurality of loosely connectedsubstantially U-shaped fastener elements to be bent, a pair of headedposts rising upwardly from said stationary die member, a holding plateslidably mounted upon said posts and having one longitudinal edgeoverhanging said channel, springs surrounding said headed posts andinterposed between said plate and the heads of said headed posts, and anupper vertically slidable die member including a rib d-epending from thebottom thereof and disposed di rectly above said channel but clear ofthe plane of the overhanging edge of said holding plate for directpressing engagement with one leg of the U-shaped fastener element to bebent when the upper die member is moved downward to bend: ing positionrelative to the lower stationary die member.

' NATHAN KASE.

LOUIS WIESENFELD.

